Information transmission method and terminal device

Abstract

An information transmission method includes: if a PRACH transmission occasion is valid and a PUSCH transmission occasion associated with the PRACH transmission occasion is valid, transmitting a PRACH corresponding to a random access message on the PRACH transmission occasion, and transmitting a PUSCH corresponding to the random access message on the PUSCH transmission occasion.

What is claimed is: 
     
         1 . An information transmission method, applied to a terminal device, comprising:
 in a 2-step random access process, when a physical random access channel (PRACH) transmission occasion is valid and there is no valid physical uplink shared channel (PUSCH) transmission occasion associated with the PRACH transmission occasion, transmitting a PRACH corresponding to a random access message on the PRACH transmission occasion, and abandoning transmission for a PUSCH corresponding to the random access message;   wherein the PRACH transmission occasion is valid when there is no conflict between a time domain resource where the PRACH transmission occasion is and downlink (DL) resource or DL transmission.   
     
     
         2 . The method according to  claim 1 , wherein the terminal device works on an unlicensed frequency band; and
 the transmitting the PRACH corresponding to the random access message on the PRACH transmission occasion comprises:   if a time interval between the PRACH transmission occasion and the PUSCH transmission occasion is greater than or equal to a preset time interval, transmitting the PRACH corresponding to the random access message on the PRACH transmission occasion.   
     
     
         3 . The method according to  claim 1 , wherein the terminal device works on an unlicensed frequency band; and
 the transmitting the PRACH corresponding to the random access message on the PRACH transmission occasion comprises:   if a total duration occupied by the PRACH transmission occasion and the PUSCH transmission occasion is greater than or equal to a preset duration, transmitting the PRACH corresponding to the random access message on the PRACH transmission occasion.   
     
     
         4 . The method according to  claim 3 , wherein
 the preset duration is relevant to a listen before talk (LBT) category used by the terminal device.   
     
     
         5 . The method according to  claim 1 , wherein the random access message is an msg A in the 2-step random access process. 
     
     
         6 . A terminal device, comprising: a memory, a processor and a computer program which is stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, causes the terminal device to perform:
 in a 2-step random access process, when a physical random access channel (PRACH) transmission occasion is valid and there is no valid physical uplink shared channel (PUSCH) transmission occasion associated with the PRACH transmission occasion, transmitting a PRACH corresponding to a random access message on the PRACH transmission occasion, and abandoning transmission for a PUSCH corresponding to the random access message;   wherein the PRACH transmission occasion is valid when there is no conflict between a time domain resource where the PRACH transmission occasion is and downlink (DL) resource or DL transmission.   
     
     
         7 . The terminal device according to  claim 6 , wherein the terminal device works on an unlicensed frequency band; and
 the computer program, when executed by the processor, causes the terminal device to perform:   if a time interval between the PRACH transmission occasion and the PUSCH transmission occasion is greater than or equal to a preset time interval, transmitting the PRACH corresponding to the random access message on the PRACH transmission occasion.   
     
     
         8 . The terminal device according to  claim 6 , wherein the terminal device works on an unlicensed frequency band; and
 the computer program, when executed by the processor, causes the terminal device to perform:   if a total duration occupied by the PRACH transmission occasion and the PUSCH transmission occasion is greater than or equal to a preset duration, transmitting the PRACH corresponding to the random access message on the PRACH transmission occasion.   
     
     
         9 . The terminal device according to  claim 8 , wherein
 the preset duration is relevant to a listen before talk (LBT) category used by the terminal device.   
     
     
         10 . The terminal device according to  claim 6 , wherein the random access message is an msg A in the 2-step random access process. 
     
     
         11 . A non-transitory computer readable medium, storing a computer program, wherein the computer program, when executed by a processor of a terminal device, causes the processor of the terminal device to perform:
 in a 2-step random access process, when a physical random access channel (PRACH) transmission occasion is valid and there is no valid physical uplink shared channel (PUSCH) transmission occasion associated with the PRACH transmission occasion, transmitting a PRACH corresponding to a random access message on the PRACH transmission occasion, and abandoning transmission for a PUSCH corresponding to the random access message;   wherein the PRACH transmission occasion is valid when there is no conflict between a time domain resource where the PRACH transmission occasion is and downlink (DL) resource or DL transmission.   
     
     
         12 . The non-transitory computer readable medium according to  claim 11 , wherein:
 the terminal device works on an unlicensed frequency band; and   the computer program, when executed by the processor of the terminal device, causes the processor of the terminal device to perform:
 if a time interval between the PRACH transmission occasion and the PUSCH transmission occasion is greater than or equal to a preset time interval, transmitting the PRACH corresponding to the random access message on the PRACH transmission occasion. 
   
     
     
         13 . The non-transitory computer readable medium according to  claim 11 , wherein:
 the terminal device works on an unlicensed frequency band; and   the computer program, when executed by the processor of the terminal device, causes the processor of the terminal device to perform:
 if a total duration occupied by the PRACH transmission occasion and the PUSCH transmission occasion is greater than or equal to a preset duration, transmitting the PRACH corresponding to the random access message on the PRACH transmission occasion. 
   
     
     
         14 . The non-transitory computer readable medium according to  claim 13 , wherein the preset duration is relevant to a listen before talk (LBT) category used by the terminal device. 
     
     
         15 . The non-transitory computer readable medium according to  claim 11 , wherein the random access message is an msg A in the 2-step random access process.